jQuery.extend({
	roundabout_shape: {
		def: 'lazySusan',
		lazySusan: function(r, a, t) {
			return {
				x: Math.sin(r + a),
				y: (Math.sin(r + 3 * Math.PI / 2 + a) / 8) * t,
				z: (Math.cos(r + a) + 1) / 2,
				scale: (Math.sin(r + Math.PI / 2 + a) / 2) + 0.5
			}
		}
	}
});
jQuery.fn.roundabout = function() {
	var options = (typeof arguments[0] != 'object') ? {}: arguments[0];
	options = {
		bearing: (typeof options.bearing == 'undefined') ? 0.0 : parseFloat(options.bearing % 360.0, 4),
		tilt: (typeof options.tilt == 'undefined') ? 0.0 : parseFloat(options.tilt, 4),
		minZ: (typeof options.minZ == 'undefined') ? 100 : parseInt(options.minZ, 10),
		maxZ: (typeof options.maxZ == 'undefined') ? 400 : parseInt(options.maxZ, 10),
		minOpacity: (typeof options.minOpacity == 'undefined') ? 0.40 : parseFloat(options.minOpacity, 2),
		maxOpacity: (typeof options.maxOpacity == 'undefined') ? 1.00 : parseFloat(options.maxOpacity, 2),
		minScale: (typeof options.minScale == 'undefined') ? 0.40 : parseFloat(options.minScale, 2),
		maxScale: (typeof options.maxScale == 'undefined') ? 1.00 : parseFloat(options.maxScale, 2),
		duration: (typeof options.duration == 'undefined') ? 600 : parseInt(options.duration, 10),
		btnNext: options.btnNext || null,
		btnPrev: options.btnPrev || null,
		easing: options.easing || 'swing',
		clickToFocus: (options.clickToFocus !== false),
		focusBearing: (typeof options.focusBearing == 'undefined') ? 0.0 : parseFloat(options.focusBearing % 360.0, 4),
		shape: options.shape || 'lazySusan',
		debug: options.debug || false,
		childSelector: options.childSelector || 'li',
		startingChild: (typeof options.startingChild == 'undefined') ? null: parseInt(options.startingChild, 10)
	};
	this.each(function(i) {
		var ref = jQuery(this);
		var childSelector = options.childSelector;
		var children = ref.children(childSelector);
		var period = 360.0 / children.length;
		var startingBearing = (options.startingChild === null) ? options.bearing: options.startingChild * period;
		ref.addClass('roundabout-holder').css('padding', 0).css('position', 'relative').css('z-index', options.minZ).attr('bearing', startingBearing).attr('tilt', options.tilt).attr('minZ', options.minZ).attr('maxZ', options.maxZ).attr('minOpacity', options.minOpacity).attr('maxOpacity', options.maxOpacity).attr('minScale', options.minScale).attr('maxScale', options.maxScale).attr('duration', options.duration).attr('easing', options.easing).attr('clickToFocus', options.clickToFocus).attr('focusBearing', options.focusBearing).attr('animating', '0').attr('childInFocus', -1).attr('shape', options.shape).attr('period', period).attr('debug', options.debug).attr('childSelector', options.childSelector);
		children.each(function(i) {
			var degrees = period * i;
			var startPos;
			jQuery(this).addClass('roundabout-moveable-item').css('position', 'absolute').attr('degrees', degrees);
			startPos = [jQuery(this).width(), jQuery(this).height(), parseInt(jQuery(this).css('font-size'), 10)];
			jQuery(this).attr('startPos', startPos.join(','));
			if (options.clickToFocus === true) {
				jQuery(this).click(function(e) {
					if (!jQuery.roundabout_isInFocus(ref, degrees)) {
						e.preventDefault();
						if (ref.attr('animating') == '0') {
							ref.roundabout_animateAngleToFocus(degrees)
						}
						return false
					}
				})
			}
		});
		if (options.btnNext) {
			jQuery(options.btnNext).click(function(e) {
				e.preventDefault();
				if (ref.attr('animating') == '0') {
					ref.roundabout_animateToNextChild()
				}
				return false
			})
		}
		if (options.btnPrev) {
			jQuery(options.btnPrev).click(function(e) {
				e.preventDefault();
				if (ref.attr('animating') == '0') {
					ref.roundabout_animateToPreviousChild()
				}
				return false
			})
		}
		ref.roundabout_updateChildPositions()
	});
	return this
};
jQuery.fn.roundabout_setTilt = function(newTilt) {
	this.each(function(i) {
		jQuery(this).attr('tilt', newTilt);
		jQuery(this).roundabout_updateChildPositions()
	});
	return this
};
jQuery.fn.roundabout_setBearing = function(newBearing) {
	this.each(function(i) {
		jQuery(this).attr('bearing', parseFloat(newBearing % 360, 4));
		jQuery(this).roundabout_updateChildPositions()
	});
	if (typeof arguments[1] === 'function') {
		var callback = arguments[1];
		setTimeout(function() {
			callback()
		},
		0)
	}
	return this
};
jQuery.fn.roundabout_adjustBearing = function(delta) {
	delta = parseFloat(delta, 4);
	if (delta !== 0) {
		this.each(function(i) {
			jQuery(this).attr('bearing', jQuery.roundabout_getBearing(jQuery(this)) + delta);
			jQuery(this).roundabout_updateChildPositions()
		})
	}
	return this
};
jQuery.fn.roundabout_adjustTilt = function(delta) {
	delta = parseFloat(delta, 4);
	this.each(function(i) {
		jQuery(this).attr('tilt', parseFloat(jQuery(this).attr('tilt'), 4) + delta);
		jQuery(this).roundabout_updateChildPositions()
	});
	return this
};
jQuery.fn.roundabout_animateToBearing = function(bearing) {
	bearing = parseFloat(bearing, 4);
	var currentTime = new Date();
	var data = (typeof arguments[3] !== 'object') ? null: arguments[3];
	var duration = (typeof arguments[1] == 'undefined') ? null: arguments[1];
	var easingType = (typeof arguments[2] != 'undefined') ? arguments[2] : null;
	this.each(function(i) {
		var ref = jQuery(this),
		timer,
		easingFn,
		newBearing;
		var thisDuration = (duration === null) ? parseInt(ref.attr('duration'), 10) : duration;
		var thisEasingType = (easingType !== null) ? easingType: ref.attr('easing') || 'swing';
		if (data === null) {
			data = {
				timerStart: currentTime,
				start: jQuery.roundabout_getBearing(ref),
				totalTime: thisDuration
			}
		}
		timer = currentTime - data.timerStart;
		if (timer < thisDuration) {
			ref.attr('animating', '1');
			if (typeof jQuery.easing.def == 'string') {
				easingFn = jQuery.easing[thisEasingType] || jQuery.easing[jQuery.easing.def];
				newBearing = easingFn(null, timer, data.start, bearing - data.start, data.totalTime)
			} else {
				newBearing = jQuery.easing[thisEasingType]((timer / data.totalTime), timer, data.start, bearing - data.start, data.totalTime)
			}
			ref.roundabout_setBearing(newBearing,
			function() {
				ref.roundabout_animateToBearing(bearing, thisDuration, thisEasingType, data)
			})
		} else {
			bearing = (bearing < 0) ? bearing + 360 : bearing % 360;
			ref.attr('animating', '0');
			ref.roundabout_setBearing(bearing)
		}
	});
	return this
};
jQuery.fn.roundabout_animateToDelta = function(delta) {
	var duration, easing;
	if (typeof arguments[1] !== 'undefined') {
		duration = arguments[1]
	}
	if (typeof arguments[2] !== 'undefined') {
		easing = arguments[2]
	}
	this.each(function(i) {
		delta = jQuery.roundabout_getBearing(jQuery(this)) + delta;
		jQuery(this).roundabout_animateToBearing(delta, duration, easing)
	});
	return this
};
jQuery.fn.roundabout_animateToChild = function(childPos) {
	var duration, easing;
	if (typeof arguments[1] !== 'undefined') {
		duration = arguments[1]
	}
	if (typeof arguments[2] !== 'undefined') {
		easing = arguments[2]
	}
	this.each(function(i) {
		var ref = jQuery(this);
		if (parseInt(ref.attr('childInFocus'), 10) !== childPos && ref.attr('animating', '0')) {
			var child = jQuery(ref.children(ref.attr('childSelector'))[childPos]);
			ref.roundabout_animateAngleToFocus(parseFloat(child.attr('degrees'), 4), duration, easing)
		}
	});
	return this
};
jQuery.fn.roundabout_animateToNextChild = function() {
	var duration, easing;
	if (typeof arguments[0] !== 'undefined') {
		duration = arguments[0]
	}
	if (typeof arguments[1] !== 'undefined') {
		easing = arguments[1]
	}
	this.each(function(i) {
		if (jQuery(this).attr('animating', '0')) {
			var bearing = 360.0 - jQuery.roundabout_getBearing(jQuery(this));
			var period = parseFloat(jQuery(this).attr('period'), 4),
			j = 0,
			range;
			while (true) {
				range = {
					lower: period * j,
					upper: period * (j + 1)
				};
				if (bearing <= range.upper && bearing > range.lower) {
					jQuery(this).roundabout_animateToDelta(bearing - range.lower, duration, easing);
					break
				}
				j++
			}
		}
	});
	return this
};
jQuery.fn.roundabout_animateToPreviousChild = function() {
	var duration, easing;
	if (typeof arguments[0] !== 'undefined') {
		duration = arguments[0]
	}
	if (typeof arguments[1] !== 'undefined') {
		easing = arguments[1]
	}
	this.each(function(i) {
		if (jQuery(this).attr('animating', '0')) {
			var bearing = 360.0 - jQuery.roundabout_getBearing(jQuery(this));
			var period = parseFloat(jQuery(this).attr('period'), 4),
			j = 0,
			range;
			while (true) {
				range = {
					lower: period * j,
					upper: period * (j + 1)
				};
				if (bearing >= range.lower && bearing < range.upper) {
					jQuery(this).roundabout_animateToDelta(bearing - range.upper, duration, easing);
					break
				}
				j++
			}
		}
	});
	return this
};
jQuery.fn.roundabout_animateAngleToFocus = function(target) {
	var duration, easing;
	if (typeof arguments[1] !== 'undefined') {
		duration = arguments[1]
	}
	if (typeof arguments[2] !== 'undefined') {
		easing = arguments[2]
	}
	this.each(function(i) {
		var delta = jQuery.roundabout_getBearing(jQuery(this)) - target;
		delta = (Math.abs(360.0 - delta) < Math.abs(0.0 - delta)) ? 360.0 - delta: 0.0 - delta;
		delta = (delta > 180) ? -(360.0 - delta) : delta;
		if (delta !== 0) {
			jQuery(this).roundabout_animateToDelta(delta, duration, easing)
		}
	});
	return this
};
jQuery.fn.roundabout_updateChildPositions = function() {
	this.each(function(i) {
		var ref = jQuery(this);
		var inFocus = -1;
		var data = {
			bearing: jQuery.roundabout_getBearing(ref),
			tilt: parseFloat(ref.attr('tilt'), 4),
			stage: {
				width: Math.floor(ref.width() * 0.9),
				height: Math.floor(ref.height() * 0.9)
			},
			animating: ref.attr('animating'),
			inFocus: parseInt(ref.attr('childInFocus'), 10),
			focusBearingRad: jQuery.roundabout_degToRad(parseFloat(ref.attr('focusBearing'), 4)),
			shape: jQuery.roundabout_shape[ref.attr('shape')] || jQuery.roundabout_shape[jQuery.roundabout_shape.def]
		};
		data.midStage = {
			width: data.stage.width / 2,
			height: data.stage.height / 2
		};
		data.nudge = {
			width: data.midStage.width + data.stage.width * 0.05,
			height: data.midStage.height + data.stage.height * 0.05
		};
		data.zValues = {
			min: parseInt(ref.attr('minZ'), 10),
			max: parseInt(ref.attr('maxZ'), 10)
		};
		data.zValues.diff = data.zValues.max - data.zValues.min;
		data.opacity = {
			min: parseFloat(ref.attr('minOpacity'), 2),
			max: parseFloat(ref.attr('maxOpacity'), 2)
		};
		data.opacity.diff = data.opacity.max - data.opacity.min;
		data.scale = {
			min: parseFloat(ref.attr('minScale'), 2),
			max: parseFloat(ref.attr('maxScale'), 2)
		};
		data.scale.diff = data.scale.max - data.scale.min;
		ref.children(ref.attr('childSelector')).each(function(i) {
			if (jQuery.roundabout_updateChildPosition(jQuery(this), ref, data, i) && data.animating == '0') {
				inFocus = i;
				jQuery(this).addClass('roundabout-in-focus')
			} else {
				jQuery(this).removeClass('roundabout-in-focus')
			}
		});
		if (inFocus !== data.inFocus) {
			jQuery.roundabout_triggerEvent(ref, data.inFocus, 'blur');
			if (inFocus !== -1) {
				jQuery.roundabout_triggerEvent(ref, inFocus, 'focus')
			}
			ref.attr('childInFocus', inFocus)
		}
	});
	return this
};
jQuery.roundabout_getBearing = function(el) {
	return parseFloat(el.attr('bearing'), 4) % 360
};
jQuery.roundabout_degToRad = function(degrees) {
	return (degrees % 360.0) * Math.PI / 180.0
};
jQuery.roundabout_isInFocus = function(el, target) {
	return (jQuery.roundabout_getBearing(el) % 360 === (target % 360))
};
jQuery.roundabout_triggerEvent = function(el, child, eventType) {
	return (child < 0) ? this: jQuery(el.children(el.attr('childSelector'))[child]).trigger(eventType)
};
jQuery.roundabout_updateChildPosition = function(child, container, data, childPos) {
	var ref = jQuery(child),
	out = [];
	var startPos = ref.attr('startPos').split(',');
	var itemData = {
		startWidth: startPos[0],
		startHeight: startPos[1],
		startFontSize: startPos[2],
		degrees: parseFloat(ref.attr('degrees'), 4)
	};
	var rad = jQuery.roundabout_degToRad((360.0 - itemData.degrees) + data.bearing);
	while (rad < 0) {
		rad = rad + Math.PI * 2
	}
	while (rad > Math.PI * 2) {
		rad = rad - Math.PI * 2
	}
	var factors = data.shape(rad, data.focusBearingRad, data.tilt);
	factors.scale = (factors.scale > 1) ? 1 : factors.scale;
	factors.adjustedScale = (data.scale.min + (data.scale.diff * factors.scale)).toFixed(4);
	factors.width = factors.adjustedScale * itemData.startWidth;
	factors.height = factors.adjustedScale * itemData.startHeight;
	ref.css('left', ((factors.x * data.midStage.width + data.nudge.width) - factors.width / 2.0).toFixed(2) + 'px').css('top', ((factors.y * data.midStage.height + data.nudge.height) - factors.height / 2.0).toFixed(2) + 'px').css('width', factors.width.toFixed(2) + 'px').css('height', factors.height.toFixed(2) + 'px').css('opacity', (data.opacity.min + (data.opacity.diff * factors.scale)).toFixed(2)).css('z-index', parseInt(data.zValues.min + (data.zValues.diff * factors.z), 10)).css('font-size', (factors.adjustedScale * itemData.startFontSize).toFixed(2) + 'px').attr('current-scale', factors.adjustedScale);
	if (container.attr('debug') == 'true') {
		out.push('<div style="font-weight: normal; font-size: 10px; padding: 2px; width: ' + ref.css('width') + '; background-color: #ffc;">');
		out.push('<strong style="font-size: 12px; white-space: nowrap;">Child ' + childPos + '</strong><br />');
		out.push('<strong>left:</strong> ' + ref.css('left') + '<br /><strong>top:</strong> ' + ref.css('top') + '<br />');
		out.push('<strong>width:</strong> ' + ref.css('width') + '<br /><strong>opacity:</strong> ' + ref.css('opacity') + '<br />');
		out.push('<strong>z-index:</strong> ' + ref.css('z-index') + '<br /><strong>font-size:</strong> ' + ref.css('font-size') + '<br />');
		out.push('<strong>scale:</strong> ' + ref.attr('current-scale'));
		out.push('</div>');
		ref.html(out.join(''))
	}
	return jQuery.roundabout_isInFocus(container, itemData.degrees)
};